Not for Mac or Linux; Imbarrassingly plain looking.
Found your site and recommendation for Tellmemore. I checked out the demo on their website, but found out that there is no Mac or Linux edition. This rules it out for me and many others. I am surprised it was not mentioned in your review.
Compared with some other programs Tellmemore looks like it could be useful, however, I found that it is visually plain and just dull. The videos were horribly compressed, and not terribly involving. Better graphics would go a long way to making this set attractive and keep one interested. I fear that although it may be considered a capable learning tool for some, the extraordinary high price, dull graphics and unappealing videos make this unacceptable for me, even if my Mac could run it.